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Colour pattern in auto-sexing redbar chicks Hill, Arthur Thomas
Abstract
A study of the colour pattern of Redbar chicks was undertaken to ascertain if the male and female chicks could be distinguished and if so, to devise a system of auto-sexing them. During the 1946 season, 1080 chicks from 36 female and 4 male parents were handled. Seventeen characteristics were described on each parental bird and forty-one on each chick. Down colour differences were found and the auto-sexing accuracy was improved from 62.1% to 94.0% with 80.0% for the whole season. During the 1947 season, 542 chicks from 38 female and 6 male parents and 345 non-pedigreed pure Redbar chicks were handled. Twenty-two characteristics were described on each parental bird and eleven on each chick. Auto-sexing accuracy varied from 91.4% to 98.5% with 93.6% for the whole season. Characteristics of the heads and bodies of the chicks used to obtain these accuracies were as follows: Females - uniform brown colour, brown head stripes, brown back stripes. Males - mottled heads and backs, white head spots, very light heads and backs, short T or I shaped brown head stripe, two whitish back stripes.
Item Metadata
Title |
Colour pattern in auto-sexing redbar chicks
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1947
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Description |
A study of the colour pattern of Redbar chicks was undertaken to ascertain if the male and female chicks could be distinguished and if so, to devise a system of auto-sexing them. During the 1946 season, 1080 chicks from 36 female and 4 male parents were handled. Seventeen characteristics were described on each parental bird and forty-one on each chick. Down colour differences were found and the auto-sexing accuracy was improved from 62.1% to 94.0% with 80.0% for the whole season.
During the 1947 season, 542 chicks from 38 female and 6 male parents and 345 non-pedigreed pure Redbar chicks were handled. Twenty-two characteristics were described on each parental bird and eleven on each chick. Auto-sexing accuracy varied from 91.4% to 98.5% with 93.6% for the whole season. Characteristics of the heads and bodies of the chicks used to obtain these accuracies were as follows:
Females - uniform brown colour, brown head stripes, brown back stripes.
Males - mottled heads and backs, white head spots, very light heads and backs, short T or I shaped brown head stripe, two whitish back stripes.
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Genre | |
Type | |
Language |
eng
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Date Available |
2012-03-19
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0106897
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.